Tool lift and drive disconnecting means



Aug. 31, 1954 w. A. HARPER 2,687,702 TOOL LIFT AND DRIVE DISCONNECTINGMEANS y 11, 1950 Original Filed Jul 5 Sheets-Sheet l y INVENTOR WESLEYA. HARPER ATTORNEYS Aug. 31, 1954 w. A. HARPE R 2,687,702 I TOOL LIFTAND DRIVE DISCONNECTING MEANS Original Filed July 11 1950 5 Sheets-Sheet2 INVENTOR WESLEY A. HARPER Ma ffida 7 ATTORflE YS Aug. 31, 1954 w. A.HARPER 2,

TOOL LIFT AND DRIVE DISCONNECTING MEANS Original Filed July' 11, 1950 5Sheets-$heet 3 INVENTOR WESLEY A.HARPER' BY 7M4. 1 m1.

ATTORNEYS W. A. HARPER TOOL LIFT AND DRIVE D Aug. 31, 1954 ISCONNECTINGMEANS 5 Sheets-Sheet 4 Original Filed July 11 1950 INVENTOR WESLEY A.HARPER BYm W ATTORNEYS Aug. 31, 1954 w. A. HARPER TOOL LIFT AND DRIVEDISCONNECTING MEANS 1y ll 1950 5 Sheets-Sheet 5 Original Filed JuINVENTOR WESLEY A. HARPER BYm w 17:41.

ATTORNEYS Patented Aug. 31, 1954 2,687,702 'nooL LIFT AND DRIVEDISCONNECTING MEANS Wesley A. Harper, Bellevue, Ohio, assignor, by

mesne assignments, to C ment Limited, a corpora Jul Divided and tOriginal application 173,212. 30, 1951, Serial This invention relates tograin drills, seeders and the like, and particularly to improved driveand operatmg mechanisms for grain drills. his application is a divisionof application Serial No. 173,212, filed July 11, 1950.

In the manufacture of grain in any way whatsoever. It is also an objectof a clutch y 11, 1950, Serial ockshutt Farm Equiption of Canada hisapplication October No. 253,882

3 Claims. (01. 111-67) for the openers of the drill with the mechanismin position to thrust the openers against the ground;

Figure 3 is a view like Figure 2, but is taken from the opposite side,as indicated by line 33 on Figure 1, and shows the openers in theirelevated position;

Figure 4 is a sectional View indicated by line 4-4 on Figure 1, showingthe drives to the seeder and fertilizer feed mechanism;

Figure 5 is a sectional view showing the construction of the clutchmechanism of the drill; and

Figures 6 and 7 are exploded perspective views of the clutch mechanismillustrated in Figure 5.

members, as Cross members [4 are connected rearwardly of the front ofthe frame by an additional cross member I6, and members I4 and I6together with still another structural member 18 form a platform on eachside of the frame adapted for supporting the various operatingauxiliaries of the seeder.

At each end of the frame there is mounted a round wheel 20 by means ofan axle 22 which the rear frame member, as by every other respect.

Mounted on hopper, when driven. This material discharges into the funnelarrangements 42 that lead downwardly through the flexible tubes 44 tothe openers of the drill that are indicated at 46.

The openers 46 may be of any suitable type, such as single disk ordouble disk, or may be of to individual preference.

comprise a pair of disks forwardly converging angle on a frame 50. Asmany of the furrow openers as are necessary may be employed, and in theinstant application, there are shown eight on each side of the centerline of the drill. For each furrow opener, of course, there is a feedingmechanism in each of the seed and fertilizer hoppers.

According to the present invention, the hoppers may be continuous fromend to end, but the feed mechanisms on opposite sides of the center lineof the mechanism and the device for raising an lowering the disk openersare independent. This divided arrangement materially reduces the loadsimposed on the driving mechanisms for the feeding devices and the openeractuating devices.

Returning again to the disk openers, each of the disk opener frames 50has a drag mechanism connected thereto, as represented by bar 52 thatextends forwardly to be pivotally mounted adjacent the front of thedrill frame, as by the shaft 54. Also pivotally mounted on each of thedisk opener frames is an upwardly extending lift rod or bar 50 which isconnected with the opener frame by pin 50 and which has at its upper enda collar 60. The collar 32 is slidable on each lift bar and acompression spring 64 bears between the under side of each collar 62 anda lower collar .60 on the lift bar.

Figures 1, 2, 3, and 4, each collar 62 is connected with the outer endof a lift fork 68, the other end of which is clamped to the rectangularlift shaft 10. Shaft 10, similarly to the hopper arrangement, is in twoparts, one for each side of the drill, and each controllin eight of thelift forks 68.

On each shaft there is mounted a gear sector 12 that meshes with a rack14 reciprocable in a guide frame 15. The end of rack 14; carries a clip18 which rotatably receives an end of a crank 00. Crank 80 is threadedthrough a nut 02 having a trunnion mounting on the upper end of a lever84 pivoted, as at 86, to one of the frame members. It will be apparentat this point that movement of lever viewed in Figure clockwise movementof the lifting forks associated therewith to lift their respective diskopeners.

The disk openers in their lowered positions are depicted in Figures 2and 3, whereas Figure 4 shows them in their lifted seen hereinafter,each of the two levers 84 are adapted for being moved between their twooperative positions by a shoe 08 pivoted thereto at 90 and encompassingan eccentric cam 92 adapted for being driven by the adjacent drive shaft32.

Turning'again to the drive, each of the shafts 32 extends into a clutchmechanism, generally indicated at I00, and there being one of theseclutch mechanisms for each side of the drill.

One of these clutch mechanisms is illustrated in section in Figure 5 andin exploded perspective in Figures 6 and '1. The clutch illustrated inthese figures comprises a first clutch member consisting of a clutchhousing I02 keyed to shaft 32 as by key I04 so that whenever the drillis in movement and shaft 32 is being driven by its corresponding groundWheel, housing I02 of the clutch Will rotate. The clutch housing I02 hasa recess I05 on one side and a corresponding recess I00 on the otherside. Each of these recesses is axially grooved, as by grooves H0, aswill best be seen in Figures 6 and '7.

Rotatably mounted on shaft 32 adjacent recess I08 is the previouslymentioned lift cam 02 about which is mounted the shoe 88. Eccentric cam02 position. As will be is integral with a plate I I2 that closes therecess I08 and forms a third clutch member adapted. for being drivinglyengaged by the first clutch member. Pivoted to plate H2, as will best beseen in Figures 6 and 7, is a lever H4 positioned externally of which isrigidly connected with a lever H6 on the opposite side of the plate.Lever I I5 carries roller I I8 on one end and adapted for engagementwith the grooves I II) in recess I00 to provide a driving connectionbetween the clutch housing and plate H2 which is integral with eccentric32. A spring I20 urges the levers toward position to bring roller H0into engagement with the grooves H0.

Plate H2 has diametrically opposite notched protruding portions thereonat I22 and lever II4 has ends, as at 224, which overlie the edges of thesaid notches. The arrangement is such that a roller pressed against theperiphery of plate H2 when the clutch is rotating in the directionindicated by arrows in Figures 6 and '7 will engage the end of lever H4and disengage roller H0 from the clutch housing. The notches in plate H2provide means for latching the said roller in position to hold arm H4 inposition to disengage driver roller H8. It will be seen from theforegoing, that what is provided in connection with eccentric 92 is aone-half revolution clutch which can be automatically actuated toconnect eccentric 92 with shaft 32 for a half revolution at any time.

Associated with the recess I00 of clutch housing I02 is a similararrangement consisting of a plate I30 forming a second clutch memberalso adapted'for being drivingly connected to the first clutch memberand having an external arm I32 pivoted thereto and connected with theinternal arm I34 carrying drive roller I36 at one end and having aspring I30 connected to the other end. Similarly to plate H2, plate I30has notched protuberances I40 which operate in the same manner as theprotuberances I22 of plate H2. Plate I30 is keyed, as by a key I42, to ashaft I44. Each shaft I44, as will be seen in Figures 1 and 2, mounts asprocket I46 over which passes the fertilizer drive chain I48. Theshafts I44 .also extend into a unitary central transmission case I50,and therein are connected with the respective seeder drive sprocketsI52. The transmission I50 is adapted for varying the speed ratio betweenthe shafts I44 and their respective driven sprockets I52.

The connection of the fertilizer drive chain I 48 with the fertilizerdrive shaft I54 is indicated in Figures 1 and 4. In these figures, itwill be seen that the chain I48 drives a sprocket I56 on a rectangularcountershaft I53 supported in frame members I60 beneath the fertilizerhopper. Slidably mounted on shaft I50 is a compound ear comprising asmall gear I62 and a larger gear I54. Shaft I58 is drilled, as at I60,I68, and I10, and the compound gear may be pinned in alignment with anyone of these holes by means of a wire clip I12. The arrangement is suchthat gear I52 can be caused to mesh with gear I14 on the drive shaftI54, gear I64 can be caused to mesh with gear I16 on the said driveshaft, or the compound gear can be positioned so none of the gears aremeshing.

It has been mentioned before that the actuation of the clutch fordisconnecting the seeder and fertilizer drives is automatic and takesplace when the disk openers are lifted to their idle position. Themanner in which this is brought about will be seen on reference toFigures 2 and 3.

the clutch housing and the drives in operation.

However, when the openers are lifted, as in Figure 4,

pointed out that the cranks 80 are threaded, and the purpose of this isto adjust The construction of my drill is relatively compact, and theoperating parts are so loeatedthat an mining; saidslever imthe-saidrposition, and-:means responsive to-.mov.ement: of; the lever into itsfirst positiom to. establishv driving connection between saidtfirstandsecondrclutch:elementsand-to-move merit of; therieveri into its:second position todisconnectv said. drivingconnection betweensaidfirstand-second; ciutch elements.

3. In a grain: drill; a; frame ahopper. on the; frame having feeding?devices, openers pivotaily mounted on the frame and-having lowered work.ing; positions and elevated idle positions; said iramev having a groundwheeL, a. second: shaft on the; frame coaxial with said drive shaft andconnected to drive said: feeding, devices, a first clutch element rigidon the drive shaft, a second clutch element rigid: with. said secondshaft and located on one: sideof saidfirst clutch element, said-secondciutchelement havmg means for estabiishingt a driving. connection withsaid first ciutoh1 element amocie shaft; on said frame and lift arms;on" therock shaft, connected with saidopeners, gear means on; therockshaft, a rack.

meshing with said. g-earmeans to rock the rock.

shait toalift-said openers when the rack is moved 11110135 direction"and: to rock: the rockshai-t to lower? said'i openers when the rack ismoved in the-other direction; as lever pivoted; on said. frameandconnected with said'racie'tm move said: rack upon-pivotingrofsaid-levenan eocentricrotatable on. saiddrive: shaft onv the oppositeside of. said 5e first clutch: element from said second clutch-1 elementand; connected with said; lever so that rotation of; saideccentricwillpivot-.sa-id lever" to move said ra said eocentri 101'. clutch eiememeans-for es n tablishing. a drivingeormectioirwith ck, a third clutch:eiementlfixed to c and located: adjacent. said first t, said. thirdclutch element havingsaid first clutch element, and means controllingsaid last-mentioned. means for. establishing; the

drivingconnectionbetween said thirdv clutch ele- 15: ment and; saidfirst eiutche1'ement. -t0- cause ro tation of said eccentric.

References 2 20? Number Cited. inwthefile or. this patent; UNITED"STATES PATENTS? Name Date Arney' June23; 1874 Armitage Man. 4; 1-902Riechelt Jan. 31, I922 Schaefier Mar. 25, 1930 Hippie Feb. 23, I932

